Gun-swab



(No Model.)

J. F. DAVIS.

GUN SWAB.

Patented Nov. 28, 1882 WITN EEIEIEE- I NVE NTEIFM N. PETERS, Plmm-umq n lm. Wailnnglnn. o. c.

UNITED STATES PATENT OFFICE.

JAMES F. DAVIS, OF FALL RIVER, MASSACHUSETTS.

GUN-SWAB.

SPECIFICATION forming part of Letters Patent No. 268,004, dated November 28, 1882.

Application filed July 3, 1882.

To all whom it may concern:

Be it known that I, JAMES F. DAVIS, of Fall River, in the county of Bristol and State of Massachusetts, have invented a new and useful Improvement in Gun-Cleaners.

The obiect of my invention is the simultaneous expansion and contraction of both the swabs on the gun-cleaner at exactly the same time to precisely the same size or circumference, with but one operation for all.

The following is a specification of my invention, reference being bad to the accompanying drawings.

Like letters indicate like parts.

Figure 1 is asectional view of my gun-cleaner and invention shown in the gun-barrel. Fig. 2 is a side view of my invention.

0 is a solid cylinder with a small bore and perforations, a a, substantially like the cylinder 0 set forth in my Letters Patent No. 24.7,5I1, hearing date September 27, 1881, except that in my present invention the nut on the end of cylinder 0 is a rigid head, I.

B is a tubular joint, also substantially the same.

E E are the swabs, and E E the metal disks inclosing the same.

A is a movable sleeve or hollo w cylinder over the solid cylinder 0, moving back and forth freely when acted upon from a: m, but prevented from turning by the pin 0 in the solid cylinder O projecting through the slot bin the sleeve or hollow cylinder A. If preferred, this sleeve or hollow cylinder can be constructed of a spiral spring of suitable power.

0 e are perforations in the hollow cylinder A, to allow the passage of the cleaning-fluids from tube 15 through the bore and perforations a a in solid cylinder (1.

w a: isa screw-joint, with which tube B and solid cylinder 0 are united.

In my present invention both swabs E E are acted upon and simultaneously expanded or (No model contracted to the desired circumference or size, through the sleeve A and the screw was, by simply turning the handle of thegun-cleauer. Tube B, being part thereof, operates at 00 m the screw-joint, and thereby, by means of the sleeve on cylinder A, is tightened against or relieved from pressure at I. A, being between the disks E E and swabs E E and I and a: x, acts reciprocally, and the swabs are simultaneously acted upon on both sides, and equally expanded or allowed to contract as the pressure is brought to bear or relieved from 00 or.

Heretofore to expand or contract the swabs it was necessary to first tighten the nut on the one end of the solid cylinderUand then tighten at the handle on the other end. It is obvious that it was almost an impossibility to adjust both the swabs to the gun-barrel nicely and exactly of the same size-a thing much sought for and greatly needed. By my combination with sleeve A the diffioulty of unequal pressure and unequalsizes is overcomeand removed, because by means of my sleeve A the pressure acts exactly at the same instant with equal force upon all sides of the disks and swabs.

What 1 claim as a novel and useful invention, and desire to secure by Letters Patent, is-- In a gun-cleaner, the disks E E and the expansible swabs E E, held between said disks, in combination with the perforated cylinder 0, having at one end a fixed head, I, and at the other end a screw-thread, 00, together with the sleeve A, engaging with said cylinder G by means of the slot 1) and pin 0, and having perforations e e to discharge the cleansing-fluid from the duct (6 between said swabs E E, substantially as and for the purpose specified.

JAMES F. DAVIS.

Witnesses:

GEORGE E. BAMFORD, HENRY H. EARL. 

